Al含量对闪锌矿GaN/AlxGa1-xN量子点光学性质的影响

Influence of the Al Content on Optical Properties in Cubic GaN/Al_xGa_(1-x)N Quantum Dots

利用有效质量近似和变分原理,考虑量子点的3维约束效应,研究了圆柱形闪锌矿GaN/AlxGa1-xN量子点的光学特性随势垒层Al含量的变化关系问题。结果表明,势垒层Al含量对量子点的发光波长、振子强度和激子结合能有重要的影响,激子效应对量子点发光波长的影响很大。

Based on the framework of effective-mass approximation and variational approach,the optical properties are investigated theoretically in cubic GaN/AlxGa1-xN quantum dots.Considering the three-dimensional confinement of electron and hole pair,the exciton binding energy,emission wavelength and oscillator strength are calculated as function of Al content in barrier.The results elucidate that the Al content in barrier has a significant influence on optical properties of cubic GaN/AlxGa1-xN quantum dots.Exciton effect has important influence on emission wavelength.